// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Dumps the contents of a QUIC crypto handshake message in a human readable
// format.
//
// Usage: crypto_message_printer_bin <hex of message>

#include <iostream>

#include "base/command_line.h"
#include "net/quic/crypto/crypto_framer.h"
#include "net/quic/quic_utils.h"

using std::cerr;
using std::cout;
using std::endl;

namespace net {

class CryptoMessagePrinter : public net::CryptoFramerVisitorInterface {
public:
    void OnHandshakeMessage(const CryptoHandshakeMessage& message) override
    {
        cout << message.DebugString() << endl;
    }

    void OnError(CryptoFramer* framer) override
    {
        cerr << "Error code: " << framer->error() << endl;
        cerr << "Error details: " << framer->error_detail() << endl;
    }
};

} // namespace net

int main(int argc, char* argv[])
{
    base::CommandLine::Init(argc, argv);

    if (argc != 2) {
        cerr << "Usage: " << argv[0] << " <hex of message>\n";
        return 1;
    }

    net::CryptoMessagePrinter printer;
    net::CryptoFramer framer;
    framer.set_visitor(&printer);
    std::string input = net::QuicUtils::HexDecode(argv[1]);
    if (!framer.ProcessInput(input)) {
        return 1;
    }
    if (framer.InputBytesRemaining() != 0) {
        cerr << "Input partially consumed. " << framer.InputBytesRemaining()
             << " bytes remaining." << endl;
        return 2;
    }
    return 0;
}
